How to generate texture image for home interior and how to use it in OpenGL ES?
Blender exports the .obj file correctly I can't see a reason why empty values ",,,," are written in the converted file.

mtllib Musium.mtl
o Plane.275_Plane.229
v 138.827621 -14.357000 -71.175812
v 145.607269 -14.357000 -71.175812
v 138.827621 -14.357000 -123.266418
v 145.607269 -14.357000 -123.266418
vt 0.882195 0.266138
vt 0.983474 0.328281
vt 0.122201 0.759672
vt 0.020922 0.697529


It seems to be a bug/issue in the obj2opengl.pl converter possible it expects optional values which do not occur and therefore it writes empty values (between the commas).

I would recommend to write your own exporter, to get started you could use the code I posted here: How do we access Vert, Norm and UV data then print to a text file using Blender/Python?